Radiant|Lab Grown|IGI

1.28ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG754594875

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG754594875

Diamond specifications and retailer prices

From $257 USD
As of November 4, 2026
Save $1,833 USD (88%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $2,090 USD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG754594875 or 754594875. Listed at 25 retailers as of November 4, 2026, with prices from $257 to $2,090, a $1,833 spread on the same certified stone. Brilliant Earth lists it at $2,090. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
D
Color
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.5°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594875
Dimensions7.95 × 5.39 × 3.46 mm
L/W Ratio1.47
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.95 mm5.39 mm1.28 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594875
Side View
Table 60.0%Crown 42.5°Girdle: MED-STKPavilion 32.7°Culet: NoneDepth 64.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $2,090 USD|Low: $257 USD|High: $2,270 USD|Avg: $831 USD|-7.9%
Brilliant Earth
Retailer 2
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Retailer 22
November 4, 2026
Retailer 16$257 USD
Retailer 6$298 USD
Retailer 2$326 USD
Retailer 14$336 USD
Retailer 13$371 USD
Retailer 21$450 USD
Retailer 11$495 USD
Retailer 4$528 USD
Retailer 9$579 USD
Retailer 3$601 USD
Retailer 7$704 USD
Retailer 8$780 USD
Retailer 19$977 USD
Retailer 18$1,023 USD
Retailer 17$1,073 USD
Retailer 22$1,075 USD
Retailer 5$1,181 USD
Retailer 15$1,272 USD
Retailer 10$1,347 USD
Retailer 20$1,373 USD
Retailer 12$1,860 USD
Brilliant Earth$2,090 USD

31 data points across 22 retailers

25 retailers$257 USD to $2,090 USD

A
Cheapest Retailer
-
$257 USD
A
Retailer 2
-
$298 USD
View
A
Retailer 3
-
$318 USD
View
Final sale: no returns
A
Retailer 4
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$326 USD
View
A
Retailer 5
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$336 USD
View
A
Retailer 6
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$371 USD
View
A
Retailer 7
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$450 USD
View
A
Retailer 8
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$495 USD
View
A
Retailer 9
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$528 USD
View
A
Retailer 10
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$579 USD
View
A
Retailer 11
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$589 USD
View
A
Retailer 12
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$601 USD
View
B+
Retailer 13
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$704 USD
View
B+
Retailer 14
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$780 USD
View
B+
Retailer 15
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$855 USD
View
B
Retailer 16
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$977 USD
View
B+
Retailer 17
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$1,023 USD
View
B+
Retailer 18
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$1,073 USD
View
B+
Retailer 19
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$1,075 USD
View
B
Retailer 20
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$1,181 USD
View
Retailer 21
-
$1,272 USD
View
Price last confirmed 27 days ago
B
Retailer 22
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$1,347 USD
View
B
Retailer 23
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$1,373 USD
View
Retailer 24
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$1,860 USD
View
Price last confirmed 17 days ago
Most Expensive
B
Brilliant Earth
17981344A · Nov 4
$2,090 USD
View
24 more retailers have this diamond
Prices start from $257 USDSave up to $1,833 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.28ct Radiant
$257 USD